Phosphodiester Bond in DNA

Q. What bonds link the two complementary strands of the DNA molecule?

1. Ester bonds
2. Glycosidic bonds
3. Purine - pyrimidine hydrogen bonds
4. All of the above

Q. The number of glycosidic bonds associated with the DNA of haploid human cells are

1. $6.6\times {10}^9$
2. $2\times 6.6\times {10}^9$
3. $3.3\times {10}^9$
4. $9.9\times {10}^9$

Q. The bonds present in between two complementary bases in a DNA molecule is/are

1. Hydrogen bonds
2. Glycosidic bonds
3. Phosphodiester bonds
4. Ionic bonds

Q. Which of these statements about eukaryotic DNA is incorrect?
I. It contains the complementary base pair A-U.
II. The two strands are antiparallel with 10 base pairs in each turn of the helix .
III. Number of purines is more than the number of pyrimidines.

1. I and III
2. II and III
3. I and III
4. I, II and III

Q. In DNA sequence of nitrogen base iss GACGATCAG then how many numbeer of H bond present in DNA

1. $20$
2. $21$
3. $22$
4. $23$

Q. Which of the following DNA sequences are considered as palindromic sequences?

निम्नलिखित में से कौनसे DNA अनुक्रम (अनुक्रमों) को पैलीन्ड्रोमिक अनुक्रम के रूप में जाना जाता है?

1. 5′ – GAATTC – 3′
   
   3′ – CTTAAG – 5′
2. 5′ – GGATCC – 3′
   
   3′ – CCTAGG – 5′
3. 5′ – CCGGGG – 3′
   
   3′ – GGCCCC – 5′
4. 5′ – GTCGAC – 3′
   
   3′ – CAGCTG – 5′

Q. The two strands in a DNA double helix are antiparallel. This means

1. The phosphate groups at the start of two DNA strands are in opposite position (pole).
2. One strand turns anti-clockwise.
3. One strand turns clockwise.
4. The phosphate groups of two DNA strands, at their ends, share the same position.

Q. The bonds present in between two complementary bases in a DNA molecule is/are

1. Hydrogen bonds
2. Glycosidic bonds
3. Phosphodiester bonds
4. Ionic bonds

Q. The bonds present in between two complementary bases in a DNA molecule is/are

1. Hydrogen bonds
2. Glycosidic bonds
3. Phosphodiester bonds
4. Ionic bonds

Q. Select the incorrect statement for genetic material of human beings.

मानवों के आनुवंशिक पदार्थ के लिए गलत कथन का चयन कीजिए।

1. Adenine pairs with thymine through two hydrogen bonds
   
   एडेनिन, थाइमिन से दो हाइड्रोजन बंध द्वारा जुड़ा होता है
2. A nitrogenous base is linked to the OH of 5′C of pentose sugar through a N-glycosidic linkage
   
   नाइट्रोजनी क्षार N-ग्लाइकोसिडिक बंध द्वारा पेन्टोज शर्करा 5′C के OH से जुड़ा होता है
3. Phosphate group is linked to a nucleoside through phosphoester linkage
   
   फॉस्फेट समूह फॉस्फोएस्टर बंध द्वारा न्यूक्लियोसाइड से जुड़ा होता है
4. Two nucleotides are linked through 3′ – 5′ phosphodiester linkage to form a dinucleotide
   
   दो न्यूक्लियोटाइड्स 3′ – 5′ फॉस्फोडाइएस्टर बंध द्वारा जुड़कर डाइन्यूक्लियोटाइड का निर्माण करते हैं

Q. If one strand of DNA has the sequence ATGCTTGA, the sequence in the complementary strand would be:

1. TACGTAGT
2. TCCGAACT
3. TACGAATC
4. TACGAACT

Q. Give diagrammatic representation to show a perfect pairing and any two wobble pairings.

Q. A DNA strand having the sequence C-G-A-T-T-G would be complementary to the sequence:

1. C-G-A-T-T-G
2. G-C-T-A-A-G
3. T-A-G-C-C-T
4. G-C-T-A-A-C

Q. Which of the following bonds are not a part of a deoxyribonucleotide?
A. Glycosidic bond
B. Phosphoester bond
C. Phosphodiester bond
D. Hydrogen bond

Choose the correct option

1. A and B
2. A and D
3. B and D
4. C and D

Q. The bonds present in between two complementary bases in a DNA molecule is/are

1. Hydrogen bonds
2. Glycosidic bonds
3. Phosphodiester bonds
4. Ionic bonds